Tooth for excavating-shovels.



J. M. SERRBRD. TOOTH FUR EXCAVATING SH'VELS. APPLICATION FILED APRA, 1907. RBNEWED DBO. 27. 1907.

UNITED STATES PATENT OFFICE.

JOHN M. SI-IERRERD, OF EASTON, PENNSYLVANIA, ASSIGNOR TO TAYLOR IRON AND STEELv COMPANY, Ol" HIGH BRIDGE, NEW JERSEY, A CORPORATION OI." NEW JERSEY.

TOOTH FOR EXCAVATING-SHOVELS.

ANo. 888,047.

Specification of Letters Patent.

Patented May 19, 199s'.

Application led April 1, 1907, Serial N. 365,672. Renewed December 27, 1907. SerialNe. 408,269

To Iw/w'm 'it may concern:

Be it known that l, Jonar M. Summum), a citizen of thc United States, residing in Easton, in the county of lNorthampton and State of Pennsylvania, have invented certain new and useful Improvements in Teeth for .Excavating-Shovels, of which the following is a specification.

This invention relates to teeth for excavating buckets or shovels, the object of the invention being to provide an improved twopart tooth in which the detachable and reversible point is conncctecd to the tooth in an improved manner.

In the drawings accompanyingl and forming part of this specification,Figure l is a sideview of'this-improved two-part tooth attached to an excavator.' shovel, which latter is shown partly in section and broken away; F ig. 2 is a perspective view of the tooth por tion or base of this two-part tooth, and Fig. 3 is a perspective view of the point.

Similar characters of reference indica-tc corresponding parts throughout the different figures of the drawings. i

This improved t\vo} arttooth comprises a tooth or body portion or base 2 and a de tachable point 3. The tooth portion is reccssed to form a. pair of jaws 4 and 5, one of which, as f or instance the upper, is usually longer than the other, and which jaws are bolted to the bucketby suitable bolts 6, the forward edge or lipf? of the bucket fitting snugly in said recess, being engaged by the forward or end wall S of such recess, so that thrust on the tooth is imparted directly to the bucket lip, and not through the medium of bolts thereto. The body of the tooth is provided with a tapered nose 9, which is divided by a centrally located recess l() into a pair of tapered or spaced lugs 1l provided with rounded ends 12. The detachable and reversible wedge-shaped point 3 is bifurcatcd to form a pair of aws 13 and 14n connected by a centrally located web or rib l5, which rigidly unites the two jalws together, thereby preventing any tendency' of the jaws to spread, and which web or rib is located in the recess of the nose and prevents lateral movement or play of the. point relative to` the tooth portion or base. In the ipresent ins tance the rear surface of the web is shown straight, conforming to the-shape of the wall forming the rear wall of the `noserceess. The web may also be provided, Ait desired,

witp an opening` for the passage of a cleaning too For securing the point to the nose, rivets or bolts extend laterally through the nose lugs and the centrally located web, thus obviating the necessity of bolts passing perpendicularly through the jaws and the nose, which is not always practicable unless one of the jaws is extended rearwardly beyond the other to a considerable extent for the reception of the same bolts which ordinarily bolt the shank of the tooth to the bucket, and which construction is not practicable with a reversible point, since in such a point the bifurcated jaws must be of substantially the same length, or unless the web of the point is materially shortened to permit a portion of the metal of the nose to be left between the bifurcated lugs thereof for the passage of the bolt therethrough, in which case it is not always practicable to leave suflicient stock in front of the bolt o ening. And furthermore, the bolt must e angularly located, all of which is avoided by riveting or bolting the point to the nose by meansiof bolts or rivets which extend laterally through the nose and the web of the point, while at the same time it enables the web to connect the bifurcated jaws of the point throughout substantially their entire length.

The tooth portion or base is provided with a pair of transversely located shoulders which are preferably located in rear of the wall 8 of the recess for the reception'of the shovel lip or blade, whereby a relatively long bearing of the jaws on the nose is provided, and also the shoulder may be located at a point-'where there is considerable stock. The bifurcated vnose and the centrally located web of the owing to the bluntness of the points. With tWopart teeth it has been the usual practice when the point has been worn to such a blunt roo , nect'ed.

'proved point is reversible in t senso of that. terni, since, as stated, before it i has become, worn at all ilI is reversible, so that it may be considered as apreformed or re- I condition that it is noteHcient to do proper work, to remove the olnt and re-shape it or supply a new one. g ,ut by roviding a reversible point the life thereoi) is very materially prolonged. The point, however, in order to be reversible in a practicable manner, must have its cuttingor penetrating' part when reversed in substantially the same plane as this part was in prior to its reversal, and to accomplish this it must have both of its jaws terminating inabout the same position with relationto the nose of the tooth, and must also have each of its jaws enga e the nose at about the saine distance from t e center line of such nose. 'This is accomplished by so locating the jaws with relation to a line (see c-c) intersecting the apex of the point and the juncture oint of the 'aws that each jaw will have its ee end at a out the same distance from that line when continued through the nose ofthe tooth, and the nose of the tooth must be correspondin ly so formed that when the point'is reversed this point will have the same position with relation to the buclretv or shovel li and will al ways he in 4the same cutting p ane', with its thrust substantiallyin line with the lip or wall of the `bucket to which the tooth isy conln other words, the relation of the tapered nose of the` tooth to the bucket lip must be 'such that the worlingend of the point will bel substantially i'n line with such ip and therefore *inv line `with the strain, whereby liability of pulling oi the point is prevented, and thisis obtained by so locatmg the nose that the end thereof is substantiallv in the same'plane as the bucket lip, while the workin end of the point is not very materially a ove the plane of the undcrsi'de of the tooth lat the rear of its nose.

This irn )rovud point and its carrying member or bodly portion are so made, as hereinbefore set forth, that the point can be assemblcd with either side up, the point thus bein f constmeted as a reversible point, so that' suc point is reversible notonly after it has become. worn intoth'ai,l condition, but isnre- 'versibleprior to any wear tberconi` rlhis ,avoids the necessity oi its always, being attached to the, nose of the body in one parl icular manner to enable it 1.o properly do its work, i Since the point can be nfttaclierl,'lu,

causoof its mode, of oonstruetion, with either' side up, as `bot-h sides,terminatein the preferred construction In the saine formation at the point, n. follows that the. jn'esent nuvcrs-iibly constructed point, that is, one couetru/'ted or formed reversibleat. the time of im manllli'aetur'e and 'bf-foro il. is attaclu-.d .to the/wwe, thus periuitting it, ahstated, lo be ie broadesn,`

terni reversibly constructedH as used herem 1s intended .to cover a point which is not only reversible al' ter 1t is worn into that condition, b ut in its preferred form is reversible prior to its being worn into that condition.

l claim` as my invention:

1. A detachable two-part shovel tooth, comprising a body portion havingmeans for attachment to a shovel or bucket and provided with a forwardly extending bifurcated nose, a point attachable to said nose and comprising a air'of jaws, a web unitin said jaws, and a p urality of means passing aterally through the nose and web for connecting the point to the nose.v

2. A detachable and reversible wedgeshaped oint bifurcated to form a pair of jaws and? openings exten ing' laterally therethrough.

3. .A detachable and reversible wedgeshaped point bifurcated to form a pair of jaws of substantially the same length, and a centrally located web uniting said jaws throughout substantially the length thereof,

a centrally lbcated web uniting said jaws, and havin a plurality of bolt or rivet said web having an opening therethrough for the passa e of a cleaning tool.

4. A' (etachable and reversible wedgeshaped point bifurcated to form a pair of jaws ofv substantially the same length, and a centrally located web uniting said jaws lbody y)ortion having, means l'or attachment ,throughout substantially the length thereof, i

to a s novel or bucket and provided with a forwardly extended bifureatid nose, and a point attaehable. to said nose and comprising a pair of jaws of substantially the same length, a eentrally located web uniting said jaws throughout substantially the length thereof, and nihuns passing lalorally through the nose and web l'or connect ingr thc point to ,the nose, said tooth having a pair of transvors' '-.ly loi-ated `shoulders extending from sido'to side and at the rear oi said nose with which the rear ends of the point jaws engage.

7. A two-purlshovel loolh, coni )rising a body porlion having means for attuciunent to a shovel or buekel and provided with a'i'ory Wardly extended bil'urealed nose., and alpoinl,v

attaelmble to-uid nose and comprising a attached y'with eithffr side up. ,'lhus, the ipairoijaws of substantially lho samelength,

a centrally located web uniting said jaws throughout substantially the length thereof, and means passing laterally through the nose and Web for connecting the oint to the nose, said tooth having a pair oi) transversely lo catedshoulders at the rear of said nose with which the rear ends of the point jaws engage, said shoulders being located in the rear of t e front edge ot the shovel lip when the twopart tooth is att-ached thereto.

8. A two-part shovel tooth, com rising a body portion having ineans for attac ment to a shovel or bucket and provided with a torwardly extended biturcated nose, and a point attachuble to said nose and comprising a pair of jaws ot substantiallythe same length, a centrally located web j uniting said -jaws throughout substantially the length thereof, and a plurality of means passing laterally through thc nose and web for connecting the point to the nose, said nose and point having Ysubstantially the same amount of metal located at cach, side ot' a line intersecting the apices ot' the nose and point, whereby the point is` reversible.

i). A detachable and reversibly constructcd ooint bil'urcated to form a pair of jaws, earn located at substantially the same distance from a line intersecting the apex and the juncture points of said jaws, and a centrally located web uniting said jaws throughout substantially the length thereofv 10. A tooth ol' the class specified, having means tor attachment to a bucket or shovel l and comprising a forwardly extended ta pered'nosc bifurcated to torrn a pair of proi jecting portions, and having openings 1o cated in said projections transversel thereof.

11.v A shovel tooth comprising a ody portion having a recess, and a tapering nose porl tion projecting forwardly from said body porl l tion and bifurcated to `torni a pair of lugs,

vsaid'nose portion terminating in ashouldyer located transversely thereof and in the rear of the front wall ot said recess, and .said lugs havinir openings extending transversely therethrough tor the reception ot bolts or rivets.

12'. A two-part shovel tooth, comprising a body ortion having means for attachment to a s ovel or bucket and provided lwith a forwardly extending bifurcatednose, a re versible point attachable to said nose and comprising a pair of jaws and a web uniting said jaws, an( a plurality of means passing laterally through the nose Aand web for connecting the point to the nose.

13. A two-part shovel tooth, comprising a body ortion having means' for attachment to a siovel or bucket and provided with a forwardly extending bifurcated nose, a reversibly constructed point attachable to said nose and comprising a pair ot jaws and a web j uniting said jaws, and a plurality of means passing laterally through the nose and web i tor connecting the point to the nose.

Signed at 9-'15 Murray st., New York, N.Y.

,l JoHN M. snsnasnn. l Witnesses C. A. Wann, F. E. Boron. 

